1*6236dae4SAndroid Build Coastguard Worker--- 2*6236dae4SAndroid Build Coastguard Workerc: Copyright (C) Daniel Stenberg, <[email protected]>, et al. 3*6236dae4SAndroid Build Coastguard WorkerSPDX-License-Identifier: curl 4*6236dae4SAndroid Build Coastguard WorkerLong: no-npn 5*6236dae4SAndroid Build Coastguard WorkerTags: Versions HTTP/2 6*6236dae4SAndroid Build Coastguard WorkerProtocols: HTTPS 7*6236dae4SAndroid Build Coastguard WorkerAdded: 7.36.0 8*6236dae4SAndroid Build Coastguard WorkerMutexed: 9*6236dae4SAndroid Build Coastguard WorkerRequires: TLS 10*6236dae4SAndroid Build Coastguard WorkerHelp: Disable the NPN TLS extension 11*6236dae4SAndroid Build Coastguard WorkerCategory: deprecated 12*6236dae4SAndroid Build Coastguard WorkerMulti: boolean 13*6236dae4SAndroid Build Coastguard WorkerSee-also: 14*6236dae4SAndroid Build Coastguard Worker - no-alpn 15*6236dae4SAndroid Build Coastguard Worker - http2 16*6236dae4SAndroid Build Coastguard WorkerExample: 17*6236dae4SAndroid Build Coastguard Worker - --no-npn $URL 18*6236dae4SAndroid Build Coastguard Worker--- 19*6236dae4SAndroid Build Coastguard Worker 20*6236dae4SAndroid Build Coastguard Worker# `--no-npn` 21*6236dae4SAndroid Build Coastguard Worker 22*6236dae4SAndroid Build Coastguard Workercurl never uses NPN, this option has no effect (added in 7.86.0). 23*6236dae4SAndroid Build Coastguard Worker 24*6236dae4SAndroid Build Coastguard WorkerDisable the NPN TLS extension. NPN is enabled by default if libcurl was built 25*6236dae4SAndroid Build Coastguard Workerwith an SSL library that supports NPN. NPN is used by a libcurl that supports 26*6236dae4SAndroid Build Coastguard WorkerHTTP/2 to negotiate HTTP/2 support with the server during https sessions. 27